Zejda Skoda Fabia 1.2 TSI CBZB
Built by Filip Zejda, it is a conversion of the Czech 1.2 TSI CBZB automotive engine suitable for ultralight and light planes. The engine produced 77kW / 105HP and 175Nm torque in 1500 to 4100 the RPM range. To maintain engine weight at Ultralight category the engine used was with an eight valve head. There is also a 16-valve version of the 1.2 TSI.
After tune the Slovak firm M. M. RACING from Bratislava, torque and speed increased up to 144 hp and 170-180Nm torque at 5500RPM. At 3000-4200 RPM torque is around 200Nm. 5500 RPM in flight, is around 2570 RPM on the propeller, with a 2.14 ratio gearbox. The reduction is Gates Polychain Timing Belts and steel pulleys with eccentric tensioning.
For the highest possible performance during a hot summer day requires cooling the compressed air inlet, that entails redesigning the cowling, or adjust the air inlet cooler designed to cool the compressed air and refrigeration division into two areas. One of them is cooling block and head, and the oil, and the other cools the compressed air inlet and a turbocharger, which are also liquid-cooled.
Test flying in a Yetti J- 03 known too as Swift J-03. During the 1.2 TSI conversion motor tests and subsequent flight tests with Yetti J-03 several propellers have been used with different diameters and different pitch. Each propeller behaved much differently, in terms of performance, climbing, vibration damping and noise produced. The final two-blade wooden propeller was designed and made to order by the Czech Republic.Rudolf Wollner company. A prop with a 2000 mm diameter, with Russian profile and pitch of 18 degree and 75 cm blade length.
Due to the construction height of the aircraft, it is not possible to use a propeller with a diameter of larger than 2000 mm. A controllable pitch propeller would take full advantage of the higher torque 210N at lower RPM for increased speed and economy. Nobody in the Czech Republic produced a useful and lightweight in-flight adjustable propeller for 130-150HP.
The weight of the engine installed in the airframe depends on all the components you need but is approximately 98 kg weight.
The engine does have direct injection, turbocharger with intercooler and a simple single ignition circuit. The engine is an easy fit into existing engine mounting points.